- All sections
- E - Fixed constructions
- E21B - Earth or rock drillingobtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 34/16 - Control means therefor being outside the borehole
Patent holdings for IPC class E21B 34/16
Total number of patents in this class: 679
10-year publication summary
|
47
|
43
|
55
|
57
|
71
|
53
|
41
|
33
|
31
|
26
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21103 |
113 |
| Saudi Arabian Oil Company | 13716 |
47 |
| Schlumberger Technology Corporation | 11089 |
41 |
| Hydril USA Distribution LLC | 214 |
29 |
| Weatherford Technology Holdings, LLC | 2036 |
19 |
| The Wellboss Company, LLC | 108 |
19 |
| Schlumberger Canada Limited | 7446 |
17 |
| National Oilwell Varco, L.P. | 1703 |
17 |
| Baker Hughes Incorporated | 5168 |
16 |
| Services Petroliers Schlumberger | 5888 |
15 |
| Schlumberger Technology B.v. | 5224 |
12 |
| Transocean Innovation Labs Ltd | 43 |
12 |
| Cameron International Corporation | 1355 |
11 |
| Baker Hughes Oilfield Operations, LLC | 2395 |
11 |
| Safoco, Inc. | 48 |
9 |
| Kobold Corp. | 42 |
9 |
| Aramco Services Company | 4108 |
8 |
| Metrol Technology Limited | 85 |
8 |
| OneSubsea IP UK Limited | 425 |
7 |
| National Coupling Company, Inc. | 61 |
6 |
| Other owners | 253 |